/usr/include/OpenEXR/IlmBaseConfig.h is in libilmbase-dev 1.0.1-3build2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 | /* config/IlmBaseConfig.h. Generated by configure. */
//
// Define and set to 1 if the target system has POSIX thread support
// and you want IlmBase to use it for multithreaded file I/O.
//
#define HAVE_PTHREAD 1
//
// Define and set to 1 if the target system supports POSIX semaphores
// and you want OpenEXR to use them; otherwise, OpenEXR will use its
// own semaphore implementation.
//
#define HAVE_POSIX_SEMAPHORES 1
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